871487 has 4 divisors (see below), whose sum is σ = 875136. Its totient is φ = 867840.

The previous prime is 871477. The next prime is 871513. The reversal of 871487 is 784178.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 871487 - 2⁸ = 871231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1439 + ... + 1952.

It is an arithmetic number, because the mean of its divisors is an integer number (218784).

2⁸⁷¹⁴⁸⁷ is an apocalyptic number.

871487 is a deficient number, since it is larger than the sum of its proper divisors (3649).

871487 is a wasteful number, since it uses less digits than its factorization.

871487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3648.

The product of its digits is 12544, while the sum is 35.

The square root of 871487 is about 933.5346806627. The cubic root of 871487 is about 95.5183850280.

The spelling of 871487 in words is "eight hundred seventy-one thousand, four hundred eighty-seven".